Last seen: Making his way as a TV and movie exec. He produced ‘Iron Man’ back in 2008 and directed ‘Couples Retreat’ a year later. He still makes the occasional cameo.

Carrie Kei Heim

Played: Cornelia in ‘Santa Claus: The Movie’ (1985)

Last seen: Working as a lawyer in Boston, whilst doubling as a novelist too.

Thomas Brodie-Sangster

Played: Sam in ‘Love Actually’ (2003)

Last seen: He played Newt in 2014 sci-fi adaptation ‘The Maze Runner’, and played Jojen Reed in a few series of ‘Game Of Thrones’.

Mara Wilson

Played: Susan in ‘Miracle On 34th Street’ (1994)

Last seen: Working for New York based charity Publicolor. She recently wrote her first Off Broadway play ‘Sheeple’, and a made-for-viral Cracked.com article about why former child stars can go a little “weird”.

Zach Galligan

Played: Billy in ‘Gremlins’ (1984)

Last seen: Now a B-movie regular, he was last seen playing Sheriff Fowler in recent slasher sequel ‘Hatchet III’.

David Krumholtz

Played: Bernard in ‘The Santa Clause’ (1994)

Last seen: As Mike Kattan in Robert Downey Jr. courtroom drama ‘The Judge’. He also plays Dr. Jack Habib in acclaimed US show ‘The Newsroom’, and he had an ill-fated cameo spot in apocalyptic Franco/Rogen comedy ‘This Is The End’. He’s also got a role in the Coens’ upcoming ‘Hail, Caesar!’.

Brett Kelly

Played: Thurman in ‘Bad Santa’ (2003)

Last seen: In 2016′s sequel ‘Bad Santa 2′, his first new acting credit in six years.

Macaulay Culkin

Played: Kevin in ‘Home Alone’ (1990)

Last seen: Confusing the Internet with his “Pizza themed” Velvet Underground tribute band, and occasionally in the tabloids thanks to complicated personal life.

Phoebe Cates

Played: Kate in ‘Gremlins’ (1984)

Last seen: She bowed out of acting in the early 90s, with 2001’s 'The Anniversary Party’ (alongside husband Kevin Kline) a rare reappearance. She now owns a boutique on New York’s Madison Avenue.

Christian Fitzpatrick

Played: Joe in ‘Santa Claus: The Movie’ (1985)

Last seen: Advertising for work as an actor and voice over artist on networking site LinkedIn.